So this is a cliché. Because it is true. Behold the following example.
The other day we put Patrick down for a nap, and we were impressed that he became silent so quickly. “Amazing,” we said. “He must actually be asleep!”
I realized I could hear him through the door, very quietly, talking to himself.
When I opened it, I found him using a pair of nail-trimming scissors (the safe-for-infants kind) to methodically and diligently cut holes in his socks. While he was still wearing said socks.